13221131123 has 4 divisors (see below), whose sum is σ = 13222012608. Its totient is φ = 13220249640.

The previous prime is 13221131093. The next prime is 13221131141. The reversal of 13221131123 is 32113112231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13221131123 - 2¹⁰ = 13221130099 is a prime.

It is a super-2 number, since 2×13221131123² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13221131095 and 13221131104.

It is not an unprimeable number, because it can be changed into a prime (13221131723) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 417848 + ... + 448373.

It is an arithmetic number, because the mean of its divisors is an integer number (3305503152).

Almost surely, 2^13221131123 is an apocalyptic number.

13221131123 is a deficient number, since it is larger than the sum of its proper divisors (881485).

13221131123 is an equidigital number, since it uses as much as digits as its factorization.

13221131123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881484.

The product of its digits is 216, while the sum is 20.

Adding to 13221131123 its reverse (32113112231), we get a palindrome (45334243354).

The spelling of 13221131123 in words is "thirteen billion, two hundred twenty-one million, one hundred thirty-one thousand, one hundred twenty-three".